Just got back from the trip. 1,240 miles round trip from Savannah, GA to Louisville, KY and back pulling a 22' car trailer loaded with a 2002 Chrysler mini van.
Everything went absolutely awesome, no issues at all. Temp guage pointed at 210 twice for about 15 seconds each time during the trip, then the roar of the fan started and it dropped right back down to normal and stayed there.
The longest pull of the trip was in southern TN, on TN-111, is a 8% grade and 4 miles long. I had the cruise set on 65 at the bottom and the converter locked, max EGT on the hill was 850, post turbo, and happened near the top of the hill. It pulled the hill much better than I was expecting really, but did slow down to about 40 by the top of the hill, that was at the 850 EGT point and I have a feeling the IAT was high at that point too. Believe it or not, coolant temp stayed the width of the needle below 210 and never moved while pulling this hill, which was a very plesant surprise. The fan was engaged and roaring the whole way up, in other words doing it's job perfectly.
All in all, I am very happy with the way it ran/pulled during the trip. It maintained whatever speed I had the cruise set to, normally 70-75 mph, the entire way and really impressed me.
